So here a question at what age did you have your daughter and son move into different rooms? Iv…

So here a question at what age did you have your daughter and son move into different rooms? Iv looked up online about it and there's no law I can find besides having common sense, but I tend to do thing earlier then need.

My daughter began schools next month when she turns 4 and Seth be 2! Should I move her into a room with me so she has more privacy with her changing taste or should i keep her in a room with her brother? Any thoughts would be nice or tips.